DNS Performance Analytics and Comparison

More than 40 Million tests per day from all around the world

Information

All DNS providers are tested every minute from 200+ locations around the world

Only IPv4 is used

A 1 second timeout is set. If a query takes longer, its marked as timeout

The data is updated once per hour. Contact us if you need real-time data

"Raw Performance" is the speed when quering each nameserver directly

"Resolver Simulation" simulates the algorithm of public DNS resolvers and shows the performance
from the resolver's point of view

"Uptime" shows the real uptime of DNS provider. A provider is marked as down only if all
nameservers go down at the same time. (in the select location)

"Quality" shows the uptime of nameservers. For example if a provider has 4 NS and 1 fails then
quality is 75% for that location and benchmark. This means even though the provider is marked as
down a real user could still get an answer thanks to the round robin algorithm used by DNS.
"Quality" does not represent the real uptime of a provider

Find out when DNSPerf and CDNPerf release new features and tools

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We rarely send messages, only when we have important news to share. No spam or annoying emails.